Which of the following is true about parallax?

A) It is used to measure distances to stars.

B) The parallax measures of distant stars are to tough to measure

C) The nearest stars have the smallest parallax angles.

D) Both A and B.

A radio has 100J of energy transferred by electricity. 20J are transferred by heating and 10J are transferred by sound. How many J are transferred by forces

Which of these new forms of energy projects will require a hydrologist as an important person on the team for developing the project? A. a waste-to-energy project B. a tidal turbine project C. an algal biofuel project D.

An blank is an object that allows only some electrons to go through it

What is the sequence of energy transformations that occur in a nuclear reactor? a. nuclear energy - mechanical energy - thermal energy - electrical energy b. nuclear energy - thermal energy - mechanical energy-electrical energy c.

How do driver of cars use galvanometer

An object will only change its motion if a force is directly applied to it. is this a true statement?

Janice has just measured the density of an object. Which value is possible? (Density: D = )

Based on how the book describes a heat pump in sec 16.3 how does a heat pump prove law of conservation of energy

When a gas in a container is squeezed to half its volume, its density?

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.